Actually Apple has already applied for a patent that shows an iPhone being docked into what appears to be a MBP. The iPhone would appear to provide the computing power as well as function as the touchpad.
Absolutely! The question is, though, who in their right mind would ever buy a MBP? While Apple may be pouring resources and effort into their iOS devices, the entire Mac lineup is slowly decaying into meaninglessness. The desktop offerings for Windows and Linux already outpace the Mac lineup by generations; and the laptop offerings are now at least as good. Worse, Windows and Linux are now reaching parity with the usability of macOS, while retaining their own unique advantages.
In short, while it may be getting easier to integrate iOS devices with Mac hardware, it is getting much, much harder to justify purchasing Mac hardware. Making the entire effort kind of pointless.
(And, really, is there a point to this at all? I've been using X-windows for decades now; the whole point of that was to make graphics displays and input devices available over the net. I used to use my Linux desktop as an external display for my Nokia N900, a phone that ran Linux natively. The only reason why you couldn't plug phones into computers and use them as subcomponents before now is that the manufacturer wouldn't allow you to.)